From: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
To: Cody P Schafer <cody@linux.vnet.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>, Linux MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
kosaki.motohiro@gmail.com
Subject: Re: [PATCH 0/3] mm: fixup changers of per cpu pageset's ->high and ->batch
Date: Sun, 07 Apr 2013 11:23:06 -0400 [thread overview]
Message-ID: <51618F5A.3060005@gmail.com> (raw)
In-Reply-To: <1365194030-28939-1-git-send-email-cody@linux.vnet.ibm.com>
(4/5/13 4:33 PM), Cody P Schafer wrote:
> In one case while modifying the ->high and ->batch fields of per cpu pagesets
> we're unneededly using stop_machine() (patches 1 & 2), and in another we don't have any
> syncronization at all (patch 3).
>
> This patchset fixes both of them.
>
> Note that it results in a change to the behavior of zone_pcp_update(), which is
> used by memory_hotplug. I _think_ that I've diserned (and preserved) the
> essential behavior (changing ->high and ->batch), and only eliminated unneeded
> actions (draining the per cpu pages), but this may not be the case.
at least, memory hotplug need to drain.
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next prev parent reply other threads:[~2013-04-07 15:23 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-05 20:33 [PATCH 0/3] mm: fixup changers of per cpu pageset's ->high and ->batch Cody P Schafer
2013-04-05 20:33 ` [PATCH 1/3] mm/page_alloc: factor out setting of pcp->high and pcp->batch Cody P Schafer
2013-04-07 1:37 ` Simon Jeons
2013-04-08 17:39 ` Cody P Schafer
2013-04-09 5:42 ` Simon Jeons
2013-04-05 20:33 ` [PATCH 2/3] mm/page_alloc: convert zone_pcp_update() to use on_each_cpu() instead of stop_machine() Cody P Schafer
2013-04-07 15:39 ` KOSAKI Motohiro
2013-04-08 17:32 ` Cody P Schafer
2013-04-08 19:26 ` KOSAKI Motohiro
2013-04-08 19:49 ` Cody P Schafer
2013-04-08 22:18 ` KOSAKI Motohiro
2013-04-09 1:52 ` Cody P Schafer
2013-04-05 20:33 ` [PATCH 3/3] mm: when handling percpu_pagelist_fraction, use on_each_cpu() to set percpu pageset fields Cody P Schafer
2013-04-07 1:56 ` Simon Jeons
2013-04-08 17:34 ` Cody P Schafer
2013-04-07 15:41 ` KOSAKI Motohiro
2013-04-08 12:20 ` Gilad Ben-Yossef
2013-04-08 17:28 ` Cody P Schafer
2013-04-08 19:50 ` Cody P Schafer
2013-04-08 22:23 ` KOSAKI Motohiro
2013-04-09 6:03 ` Gilad Ben-Yossef
2013-04-09 6:06 ` Gilad Ben-Yossef
2013-04-09 19:27 ` Cody P Schafer
2013-04-08 19:16 ` KOSAKI Motohiro
2013-04-07 1:32 ` [PATCH 0/3] mm: fixup changers of per cpu pageset's ->high and ->batch Simon Jeons
2013-04-08 19:37 ` Cody P Schafer
2013-04-07 15:23 ` KOSAKI Motohiro [this message]
2013-04-08 17:16 ` Cody P Schafer
2013-04-08 19:08 ` KOSAKI Motohiro
2013-04-08 21:17 ` Cody P Schafer
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